50 sq ft re-roof for sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material concrete tile proposed roofing material concrete tile manufacturer na brand and model na color (if cool roof required) na built-up roofing assembly system number per attached listing report (if applicable) na specific exemption from cool roof requirements (if applicable) remove and replace existing tiles required building inspector field verification (if applicable) yes -remove existing -replace underlayment -re-install existing concrete tile note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.